Tire-building drum



A. o ABBOTT. JR

TIRE BUILDING DRUM Filed Jan. 12, 1924 2 Sheets-Sheet v in n INVENTOR.ADE/AN 0. Azwo r 7, JR.

H15 A TTORNEY.

Jan. 27. 1925. 1524,46?

A. o; ABBOTT, JR

TIRE BUILDING DRUM Filed Jan. 12, 1924 z sheets-sheet 2 JNVENTOR. Auk/4N0. 45.80 rzJ/E' m ATTORNEY resented Jan. 27, 1925.

UNITED s'rA TES" PATENT; OFFICE,

6; senor-r, are, or nnrnorr, MICHIGAN, AssIGNoe T Monomer WEIGHT,

6? miracle, MIOHIGAN, A CORPORATION or MIQHIGAN.

DIRK-BUILDING DRUM.

Application tiled January 12, 192$. Serial No. 685,737.

To aZzwhom-ifinay 00mm.-

Be ithnowti thitt I A ERMN 0. Aurora, the, e eitizen of the iimtedstates, and a resident of Detroit, county of Wayne, and State ofMichigan, have invented itertitm new find useiul Tire-Building Drum, ofwhich the jifillhing is a full, clear, and

* ex'act d scriptioninvenrion reietes to the manufacture of tires, andmore "j arcieulsriy an apparat-us er building t em with. disptltd'l 1npulley=bend term P I In the manufacture (delimiter/casings, it [is usualand desirable to locate plies of stock (usually a rubberized fdlii ie,woven or weftlessa, 'a'st'd substantially completely eneire e the bends(usually mad of semieured rubber, more or less hard) my passing some ofthe lies underneath the, beeds an others around and outside the beads.These latter (outside) plies have to be stretched or fulled marginallyand laid on so as to follow the contour of the bead As ,the materialsare rubber in incompletely vuleanized form and tacky, difiiculty isexperi- 'enced in the operation.

The present invention aims to provide an apparatus facilitating thebuilding in of the beads, more particularly, applying PIIGS Of fabric tothem It further aims to provide an apparatus in which thebeadincorporating operations may be performed, While the drum is revolved,with greater uniformity,-

and in amore foolproof manner.

A preferred embodiment of the invention "is illustrated in theaccompanying drawings,

V the drawings: In other words, the pl sepa- Figure'3 IS an endelevation of Figure 1;

D Figure 4 is a. detail, partly in section,

showing racks, etc., for equalizing movement of the separating membersor rings;

untlnon-wor 1 building drum; g

Figure fi is a fragmentary section on a large scale, illustrating themanner of apzv y stock;

Figures 6 and 7 illustrate a modified form of separafinihmembeLorx-ing-mworking g relation, respectively, a.

And -Figure 8 illustrates still another modification of separatin memberor ring.

In the drawings, a bui ding drum is indicated generally by thenumeral 1. It is drical face on which the constituents of the tire arebuilt, and which is supported by spokes 2 fro1n a hub 3 fast on a shaft4 extending from a frame or housing 5, within which are located rotatingstarting and stopping mechanisms of any suitable type, such for instanceas that disclosed in patent to Hopkinson, No. 1,310,701, granted July22nd, 1919.

At, opposite sides of the drum are separating members or Ill1S 6 and 7,which may be made of metal and fairly stiif, as indicated' in- Figures 1and 2, or may be made flexible, either out of vulcanized-rubber, asindicated at 6' in Figures 6 and 7 or out of a sheet metal ring providedwith slots, as indicated at G" in Figure 8. If desired, the projectionsof the slotted form of separating member, orringmay be bent downward attheir free ends. But any material may be used and any shape may be givento the separating members or rings (1 ,and 7, the forms illustratedbeing merely specific embodiments. In all cases, however, the separatingrings are preferably made of av irth greater than that of the buildingdrum y at least twice the thickness of the beads which are indicated at8 in Figures 5, 6 and 7 of rating members or rings are, in :1 cases, ofa size and shape permitting them to overhan the beads after the latterhave been slidable (feathered) on the.- hub 3 of thebuilding drum-1. Theseparatin member or rin 7 which is nearest the housing 5 is pre: erablysecured permanently to its Spider 11,".but the other separating memberor ring 6 is preferably secured demountably to its spider 10. 'lo thisend, the annular flanged periphery.- '10 of the spider 10 is preferablyprovided with a.

any suitable manner, to and from the overhanging or working relationwith the drum in which they are shown in Figure 1, it is preferred toshift them equally in opposite directions by a single lever. And 'forthis purpose, racks and 21 are fixedly secured to the hub portions 13and spider arms 10, which support the respective separating members orrings 7'and 6. Intermediately a pinion 22 in mesh with the racks isrotatably supported on a pin 23 anchored in a block 2e fastened rigidlyand permanently to the hub 3 of the building drum 1, between its spokes2. If one of the separating rings is moved, of necessity, the ot ermoves equally and oppositely. To effcct movement, any'means may beprovided,

oove 25 (1n an enlarged por-' such as the tion of the ub 13) in whichare received the inward bent ends 26 of a fork 27, constituting one armof a bell-crank lever 28, which is fulcrumed at 29 and has 'an operatinghandle 30.- -By manipulating the handle 30, the two separating rings 6and 7 may be approached or separated equally in opposite directions.

It is desirable, at least some timcs, to' make different widths ofpulley-band's on the same drum. And in such cases, it is desirable to'stop the approach of the separating-members or rings 6 and 7 atdifierent distances apart. To this end, a block 31 having two steps orfaces 32 and 33 is frictionally se cured by a coiled spring 34 whichencircles a pivot pin 35 permanently attached to the before-mentionedblock 24. The block 3lis suitably counter-bored, as at 36,- toaccommodate the spring, one end of the in 35 being provided with a head37 affor ing a rigid abutment for the spring 34 which presses againstthe bottom of the bore 36. And in this way,-the block 31 is frictionallyheld against the face of the block 24. Either of the faces or steps '32and 33 may be presented to the stop-screw 38, which is adjustahlysecured in one of the arms of the spider 10.

may

' In operation, the stock or plies are drawn or rings 6 and 7 areremoved or shifted ofi to one side, as indicated for instance in Figure.7 ofthe drawings. When the necessary number of plies have been built upon the drum, heads 8 are then applied about as shown in Figures 5, 6and'7 of the drawings. Then the'operator manipulates the handle 30 ofthe bell-crank lever 28 .so as to bring the separatin members or=rings 6and 7 to the position a out as shown in Figure 1 of the drawings.Thereafter, one or more stock or ly 9 is applied to the drum, firstbeing rolled down intermediately with as little stretch as possible andattached to the underlying plies 9. The marginsof ply'9' will assume aposition about as indicated in dotted lines at 39 and 10, Figure 5. Thisprovides ample fullness to allow the fabric to bemo ved in with asuitable tool while the building drum is rotated to the solid line.position indicated in-Figure In doing this, of course, the-edge 40 ofthe-ply 9 is moved from the position indicated in dotted lines to theposition indicated. in solid lines, Figure 6. This done, the operatorremoves the separating members or rigid rings 6 and 7, and completes theapplicationof the stockor ply to the beads 8.

The separating members or rings 6 and 7 are then restored to the workingrelation shown in Figure 6 and the operation repeated for other plies,as required, the

number depending upon the construction of the articular tirebeingbuilt-i When the tireand has been completed, the outer separatingmember or ring 6 is bodily'removed, by suitable. manipulation of thespring detent 15, the tire-band removed. The separating member or ring 6may be restored at any convenient time prior to laying the plies'overthe outside of the beads,-

In the foregoing, the invention has been detailed with a view todisclosing-to one skilled in the art all that is necessary for acompleteunderstanding of its underlying principles. It will be understood thatthese may be embodied in various forms of construction. other than thoseillustrated and i described, and reference is therefore made to theaccompanying claims for an understanding 'of the full breadth and scopeof the invention which is not limited totreatment of one ply at a timeas twoor-more may be temporarily supported and fulled. or stretchedmarginally if desired and feasible with the stock or ply material used.

Having thus described my invention, what I claim and desire to protectby'iLetters Patent is: p i 1 1. The combination with a tire buildingdrum, of members for supporting the margins oi plies whom intermediateportions are applied directly to the d11im, t i 1 e,radial distance fromthe axis of the drum to Said snppm'ting members being greater then thatto the surface of the drum."

7 2. The combination with a tire building drum, of members forsupporting the""ifiii r'- 31118 of plies whose intermediate portionsareapplied directly to the drum,' the rad i a-l distance from the axis ofthe drum to said snpporting members being greater than that l thesurfaceof thedrum, said members being shiftable transversely of the drum.

" 3. Theoombinntion with a tire building drum, of separating membersoverhenging the margins of the drum at a radial dis Lance therefromecconunodating tween said separating members and the drum one of themembers being demountable.

4. The combination with a' tire building 1 drum, of a pair ofply-sepai"ating r embers of a. diameter greater than the drum, meanssupporting the members for movement at willto and from overhangingrelation with the drum, and means permitting removal of one of saidply-repainting members from the building drum 5. The combination with atire building drum, of a pair of ply-sepmnt1ngmembers 20f a'diametcr.greater than thellrnm, means supporting the members for movement at willto and from overhanging relation with be drum and for movement equallyin opposite directions, and means permitting one 3: of 15116 membersbeing removed to a. position not obstructing removal of a. complete- .lybuilt tire-bend.

-6. 'lhe-gibmb'nation witha tire building drum, of iii-pair ofply-separating members 4 ofa diameter greater than the drum, and

means supporting themembers for m ementet will to and from overhangingrelation with the drum, one of said ly-supporting members beingdemountab e .to permit 45 removal of a completely built u tire-band. 7.The combination with a.- tire building drum, of a pair of members fortemporarily supporting and stretching the margins only of 9. ply or liesof stock which interme- 50 diately may applied without stretching tosaid building drum, means for shifting said members transversely of thedrum, and" an adjustable 500p for limiting approach of said members inpro/determined spaced re- 55' ADRIAN o. ABBOTT, JR.

